Salt is white, pink or grey in colour and is in the form of a crystalline mineral. A small amount of it is necessary for the human diet, but it is harmful in large amounts. Salt is a compound made up of two elements, sodium and chloride and each of these play an important role …
Iron is one of the most common elements and one of the most used metals, Iron in the Latin language was called Ferrum that is why it is called (fe) in the periodic table. The thirteenth century BC is called the iron era. Iron is one of the vital factors for living as the combining …
The washing machine was first invented in the year 1858 by Hamilton Smith, the washing machine concept was rotating. In the year 1930 a new washing machine was invented that used a gasoline engine to operate. The American home appliances manufacturer Bendix Corporation was the first to invent the automatic machine was invented in the …
The idea of parachuting is to slow the fall of the human by creating a drag. The parachute is usually made from nylon because it has the advantage of being light and strong. The first idea of the parachute was in a drawings made by an anonymous Italian in the year 1470. Leonardo Da Vinci …
Soap is composed of salt, alkaline and fats and Detergents are alkylbenzenesulfonates which make more soluble in hard water than the soap. Soap is made through adding liquid alkali to heated fats or oil. Detergents are made from surfactants that cleans better than soap in hard water, it also contains enzymes, bleaches and blue dye. …
There was no alternatives for the cavemen than carving the stones to get their drawings, but when the ink was invented it gave a huge push to writing. The papyrus was the first papers invented by the Egyptians followed by the Chinese papers, while the ink appeared in China first then followed bu the Egyptian. …
Polytetrafluoroethylene (PTFE) is the chemical name for the teflon. Teflon is the material that allow the unistils to be non stickable. As the teflon has a very slippery surface, which does not allow any materials to get through or stick to it. Teflon is a material that has no odor nor color. Roy Plunkett (1910-1994) …
The start of the bicycle was in the beginnings of the 19th century, in the year 1817 the first two wheels ride with no paddles was invented by the German inventor Baron Karl von Drais (1785-1851). It was called velocipede, the rider had to push the ground with his feet in order to move the …
The first mention of the closest thing to elevators were cabs in the monastery in Sinai, Egypt. The cabs moved using ropes that were pulled by hands. Archimedes of Syracuse (287B.C.-212 B.C.), the Greek engineer, mathematician, physicist and inventor was the first to built an elevator by the year 236 B.C.. Konrad Kyeser (1366-1405), the …
The first toothpaste was mentioned in the papyrus of the Ancient Egyptians in the 4th century. The toothpaste was used to get white teeth, the toothpaste consisted from soot, gum and water. Romans in the 9th century added crushed bones or oyster shells in order to get more whiter teeth. Ziryab (789-857), improved the toothpaste …